The cluster of quakes, or “earthquake sequence” as seismologists prefer, involved more than 30 small temblors and was centered on Yorba Linda. The U.S. Geological Survey reports that the strongest quakes measured about magnitude 4.5, a moderate shake producing no damage.

The drama was related by the Richard Nixon Library’s Chris Nordyke, who said, “It shook open the door, but nothing fell off the shelves.” Good news for everyone except maybe 2012 conspiracy theorists, who now have another event to add to their “proof the world is ending” list—no matter how shaky the evidence may be.